Wrench.



D. C. MILLER.

WRENCH.

APPLICATION FILED JULY 12.1917- INVENTOR WITNESSES s 1 1% v W ATTORNEY 'tion, part of the same DAVID C. MILLER, F TULSA, OKLAHOMA.

L WRENCH.

Specification of Letters Patent. .Patented A 0, 2'7, 1918 Application filed July 12, 1917. Serial No. 180,188.

To all whom it may concern:

Be it known that I, DAVID C. MILLER, a citizen of the United States, residing at Tulsa, in the county of Tulsa and State of Oklahoma, have invented certain new and useful Improvements in Wrenches, of which the following is a specification.

This invention relates to wrenches and more particularly to improved devices especially used for lifting and turning large drilling bits used in drilling oil wells and the like. p

In the modern process of drilling oil wells the drilling bits often weigh from six hundred to two thousand pounds and must, of necessity be handled by hoisting devices or derricks when removed from the bore for sharpenin or repairing the bits.

The primary 0 ject of my invention, therefore, is to provide a devicefor engaging the bit whereby the bit may be turned or rotated to be removed from the bit stem when the bit is to be sharpened or repaired or when the same isto be placed in operative position on the bit stem and properly hung therefrom.

Another object of the invention is to provide a wrench of this character having a bit engaging portion associated with movable sections in a manner that will permit free movement of the bit engaging portion whereby the handle of the wrenchmay be moved freely while the bit is maintained in a perfectly perpendicular position. i

A further object of this invention is the provision of a wrench which consists of comparatively few parts and is simple inconstruction, but durable and well adaptedto withstand the rough usage to which devices,

of this character are ordinarily subjected.

For afull description of the invention and the advantages and merits thereof, reference is to be had to the following description and the accompanying drawings,

wherein is illustrated the preferred form of my invention, in which:

Figure 1 is a plan view of the wrench constructed in accordance with my invenbeing shown in section, the parts being in closed position.

Fig. 2 is a view of thevwrench in open position, the supporting frame being shown in plan view, the remaining parts. being shown in cross section.

, flange as shown Fig. 3 is a section on the line 3-3 of Fig. 1.

Fig. 4 is an enlarged detailed section on the line 4l 4 of Fig. 1.

Referring to the drawing, wherein is illustrated the preferred form of my invention, and in which like numerals of reference indicate corresponding parts throughout the several views, a pair of frame jaws 1 and 2are provided and are pivotally connected together on the pivot pin 3. These frame jaws, when closed, form a perfect circle as shown to advantage in Fig. 1 of the drawing thus providing a large central circular open space 4 entirely embraced by the frame jaws 1 and 2. To obtain this feature, the frame'jaws are of semicircular formation and the ends, opposite to their pivoted ends, are mortised to provide overlapping joints for effecting the complete closing of the jaws when moved into operative position. The frame jaw 2, is integrally connected at its pivoted end to the handle 5 while the corresponding-frame jaw 1 is integrally connected to the relatively short lever 6, both the handle and the lever being adapted to be actuated to. open and close the frame jaws. A ring 7 is pivotally connected to the handle 5 and may embrace one end ofthe lever 6 to maintain the lever in 7 closed position.

An outer retaining ring 8 is providedand its outer diameter is such as to be tightly embraced by the framejaws 1 when the latter are closed. This ring 8 has a portion removed to provide an open space 9 which will be closed of course, by the frame jaws 1 and 2 when the latter are closed. This space, however, permits the drill bit to be passed into the central portion of the wrench as will hereinafter appear. An inner rotatable ring 10 is fitted within the outer ring 8 and this ring also has a portion removed to form an open space ll as wide as the open space 9 1n the outer ring. The two spaces 9 and 11 communicate with the interior opening in the inner ring 10. The lower edge of the ring 10 has an annular flange 12 formed thereon extending1 beneath a portion of the outer ring 8 so t at the latter rests on the to advantage in Fig. 3. Fastened to the top of the ring 8 is a substantially U-shaped plate 13 which, in reality, is a circular plate of a diameter slightly. less than the diameter .ofsthe' outer ring 8 and is provided witha slot oi openingll-equal- 111 width to the openings 9 and ll. llllS' opening, however, extends nwardlylromthe marginal edge of the plate to a point beyond the center thereof so that the plate is substantially Ushaped. The plate is also fastened --to the inner irotatabl-e ring 10 bythe bolts 15 so that the plate will rotate the rotatable ring when the latter is actuated.

Integrally formed with the rotatable ring are the handle bars 16 which 'project fronrthe bottom thereof downwardly and outwardly in opposite directions where they fmay be conveniently grasped byithe operator. Intermediate the ends of each frame jaw land 2, is fastened. a bolt 1-7 the same being screw threadedly secured in a screw threaded opening inv the jaw. A portion of each bolt projects inwardly and into an opening or cavity 18, one of which is formed: at diametrically opposite points in the outer ring 8. ,These cavities are short "enough to receive the head' of the bolt to permit the bolt to swing with the aws when the latter are opened and closed. To limit the'swingto permit opening and closing of the jaws I while also permitting free pivotal movement of the'rings when the aws are open;

The two rings are held in associated position by the outer'ring being-received in the channel formed by the periphery .of the inner ring together with the flange l2iand the plate 13 and it will be observed that the outer ring may be disconnected by simply moving theplate 13.

The pivot pin 3 consists of a bolt pivotally connecting together the pivoted ends of the jawsand provided at one end with an eye 2 lwhich may be attached to a cable or the like tor-suspending the wrench in positionto support aheavy bit. i

Assuming. now, that the drill stem has been raised to withdraw a the bore,'and it is desired to move the drilling bit to-an adjacent anvil or the like forthe purpose of sharpening or repairing the b1t,-tl1e rmg 7 will be released fromthe lever 6 and the handle and the lever will be swung to open the frame jaws 1 and 2. The wrench may then be moved to embrace. the drill 'bitso that the lever will be positioned in the center= of the inner ring with the square sides of the bit en formedbythe slot or opening 14 The two rings, during this operation, (will be' 'supported by the bolts 17 and it will be obgagedgby the square edges of the plate 7 tamlng ring.

drilling bit from se'rvedthat the two ringswith the plate l3 may be maintained in a a horizontal plane even though the handle is tilted at an angle.

-After the drill bit has been placed in position, the aws will be swung to closed posiation and locked by placing the ring 7 over the lever 6 and the wrench will be prevented from slipping trom the drilling bit by the fact that the opening is closed by the frame jaws. The ehaiiror cable connected to the eye 21 may, by connecting the same to the derrick or the like he employedfor lifting :the drillii'ig'bit while the workman"retalnS a firm hold fon the'handle to prevent injury to theb'it while being'movedi rom place to place,

Froni' the foregoing ll? will be observed that a very simpleantl durable wrench has P1? been provided, the details of which embody the ,preferred'form. I desire it to be 'understood, howe'ver, that slight changes in" the minordetails of-construction may be made without departin from the spirit of the'in' ventionor th-e'scope oftheclaims hereunto appended: I l 1. A wrench of the character described comprising a pair of pivoted frame jaws,

and a pair of ring sections, one sectionembracing the other, each section being adapted l for independent circumferential movement; and means for pi'votally"mounting the) said sectionsof the'itramejaws.

2. A wrench of 'the character described comprising apair of jaws pivotally'com" nected together to permit thenr to be'opened c and closed, a retaining ring pivotally supported by the jaws, the latter being -a'dapt-- ed to embrace-the ring when closed, and a rotatable ring supported by the said re- 3. A wrench ofthe character described, 3: comprising a pair of jaws pivotally connected together and adapted .to forma closed circular space when in closed'position, a retaining ring embraced by the jaws and pivotally connected thereto to permitopening and closing of the'jaws while the ring is'r'e" tainedbetween the same. p I

4. A wrench of the character described comprising a pair of jaws pivotally co'nnec't-- ed together and adapted to form'a closed cir-' cular space when in closed position, a retaining ring embraced by the jaws and pivotally connected thereto to permit opening and closing of the jaws while the ring is re 1 20 tained between the same, and a rotatable ring supported by the said retaining ring.

5. A wrench of the character described,

comprising a pair of jaw's'pivotally connected together and adapted to form a closed circular space when in closed position, a retaming rlng embraced by the' aws and pivcular aws adapted to form a circular space when closed, one of the said jaws having a handle formed on its end, a lever formed on the end of the corresponding jaw, means to maintain the lever and handle in locked position when the jaws are closed, and supporting means pivotally connected with the jaws and adapted to be retained in the center of the said circular space regardless of the position of the said jaws.

7. A wrench of the character described comprising a pair of rings each having a portion removed to provide open spaces adapted to be alined for establishing communication between the exterior of the outer ring and the interior of the inner ring, and means pivotally supporting the said outer ring and adapted for movement to open and close the space in the outer ring.

8. A wrench of the character described comprising a pair of rings each having a portion removed to provide open spaces adapted for alinement when the rings are moved to a predetermined position, means for maintaining the rings in close relation for permitting independent circumferential movement, and means pivotally connected to the outer ring for supporting the two rings and for closing and opening the said spaces.

9. A wrench of the character described comprising a pair of rings, one mounted within the other, each of the rings having an open space, the said spaces being adapted for alinement when the rings are moved to a predetermined position, the outermost ring having diametrically opposite cavities, frame jaws pivotally connected together, and pins carried by the said jaws and extended into the said cavities for pivotally supporting the rings and permitting relative swinging movement of the jaws toward an away from the rings.

In testimony whereof I affix my signature in presence of two witnesses. DAVID C. MILLER.

Witnesses:

J. H. COURTNEY, JNo. S. HALE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of intents.

Washington, D. O. 1 

